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How can I do division with variables in a Linux shell?
When I run commands in my shell as below, it returns an expr: non-integer argument error. Can someone please explain this to me?
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How can I print a circular structure in a JSON-like format?
...ant to toss whatever circular references exist and send whatever can be stringified. How do I do that?
25 Answers
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Google access token expiration time
When I obtain an access_token from the Google API, it comes with an expires_in value. According to the documentation, this value indicates "The remaining lifetime of the access token".
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Does Qt support virtual pure slots?
My GUI project in Qt has a lot of "configuration pages" classes which all inherit directly from QWidget .
2 Answers
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Difference between a Factory, Provider and a Service?
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Factory: Assembles classes, either by composing a bunch of bits together, or choosing type based on some kind of context
Provider: Provider is something microsoft "invented" (basically an abstract factory pattern) that is a way of doing a factory of factories, or havi...
How to git log from all branches for the author at once?
...mmits that the author did. So far, I have the script that wraps the following command:
2 Answers
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Find commit by hash SHA in Git
I need to find a commit in Git by a given hash, SHA. For example, if I have the "a2c25061" hash, and I need to get the author and the committer of this commit.
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What does the regular expression /_/g mean?
... become "Hello there."
But along with the answer, I want to suggest something to you. Use comments.
In your code say something like:
// Replaces all underscores so that blah blah blah blah blah..
var hello = "Hello_there."
.replace(/_/g, ' ');
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String concatenation does not work in SQLite
I am trying to execute a SQlite replace function, but use another field in the function.
4 Answers
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Reuse a parameter in String.format?
Does the hello variable need to be repeated multiple times in the call to the format method or is there a shorthand version that lets you specify the argument once to be applied to all of the %s tokens?
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